The shaft has limestone pavement blocks over the entrance. It becomes too small after a squeeze onto a 3m vertical continuation. The position needs checking: Paul has it in bushes on map 30m NW of 583; but should be in line of trees 50m S of 583? See log book 7/4/98 and 15/4/98.
Reference: anon., 1998a (Easter logbook)
On area survey: